JSON Pretty Print

Beautify and format JSON data instantly. Our free online JSON pretty printer validates syntax and improves readability for debugging and development code.

Input JSON

Upload

{"status":"success","data":[{"id":1,"name":"Item 1"},{"id":2,"name":"Item 2"}]}

{"status":"success","data":[{"id":1,"name":"Item 1"},{"id":2,"name":"Item 2"}]}

Formatted JSON

Indent:

Format & Beautify Instantly

The fastest way to format, validate, and minify your JSON data. Secure, client-side, and developer-friendly.

Valid JSON

Automatically validates your JSON and highlights syntax errors to help you debug.

Syntax Highlight

Colors keywords, strings, and values to make your data easy to read and understand.

Custom Indent

Choose between 2 spaces, 4 spaces, or tabs to match your coding style.

Error Detection

Finds and points out the exact location of syntax errors in your JSON.

How this JSON Pretty Print works

The JSON Pretty Print runs entirely in your browser using JavaScript. Unlike other tools that send your data to a server, we process everything locally on your device. This guarantees 100% privacy and blazing fast speed.

No server interaction – data never leaves your device
Instant results since there is no network latency
Works offline once the page is loaded
Free to use with no usage limits

How to Use

Paste JSON

Paste your messy or minified JSON code into the editor.

Configure

Choose your preferred indentation level (2 spaces, 4 spaces, or tabs).

Result

Instantly view the beautified and strictly validated JSON output.

Example Usage

Here's a typical example of how this tool transforms your data:

Input

{"key":"value","arr":[1,2,3]}

Output

{ "key": "value", "arr": [ 1, 2, 3 ] }

Frequently Asked Questions

Is my JSON data sent to a server?

No. All processing happens 100% inside your browser. Your data never leaves your device.

Why is my JSON showing an error?

The tool strictly validates JSON syntax. Common errors include trailing commas, unquoted keys, or using single quotes instead of double quotes.

Can I formatting a large JSON file?

Yes, the tool is optimized for performance and can handle large JSON strings efficiently.

Does it support JSONP?

This tool is specifically for standard JSON. JSONP (with callback functions) may cause validation errors.

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The JSON Pretty Print is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.